Make sure the content of the person's Identifier field is present on the Citation or Thesis object, under the "Qualified Name" field. (Not the Identifier field. This is unintuitive, and there is a ticket in the Islandora system to get this changed.) As long as the information is present somewhere in that field, it will be found by the Scholar Profile.
Watch the Arca Hour on Scholar Profiles for details: http://ac-connect.bccampus.ca/p2xzipjyef3/